PROBLEM: You receive a phone call and pause your music player. When your call is complete and you unpause, the volume has been decreased.
SOLUTION: Right click the speaker icon in the bottom right-hand corner and go to SOUNDS. Click on the COMMUNICATIONS tab. Select DO NOTHING and then click OK.
WHY: Skype is automatically decreasing the volume so you can hear your call. It does not recognize that you have paused your music.